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United States Geological Service (USGS)
The USGS is the agency that is responsible for creating geographical and geological maps and publications for the continental United States and surrounding waters.
Soils Site - U.S. Department of Agriculture
This USDA web site provides access to soil surveys and scientific and research information related to the study of soils in the United States.
USGS Water Science Center
This site provides information from the USGS exclusively on water resources in the state of Wisconsin such as water quality, stream flow, and groundwater levels.
A multidisciplinary database of indexed research literature on the earth sciences including Geology.